Right now there are 401 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Tools & Home Improvement › Power & Hand Tools › Power Tool Parts & Accessories › Battery Packs & Chargers. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: DEWALT, Greenworks, BLACK+DECKER, Makita, WORX, Milwaukee, Westinghouse, Badger. Every item is a one-off, so the stock moves all day and new deals keep arriving.